Claims (10)
1. Postupak separacijskog ekstrahiranja ulja rižinih mekinja i voskova rižinih mekinja u sljedećim koracima:
a) koraku ekstrahiranja, koji uključuje osiguravanje ekstrakcijske posude (13), koja sadrži rižine mekinje (15) i perkoliranje suprakritičnog CO2 (12) kroz ekstrakcijsku posudu (13) pri tlaku ekstrahiranja p1 u rasponu od 100 do 1000 bar (10 do 100 MPa) i na temperaturi ekstrahiranja T1;
b) prvom koraku razdvajanja, koji uključuje prebacivanje suprakritičnog CO2 i ekstrakta (17), koji sadrži ulja i voskove iz koraka a), u posudu za razdvajanje (21) i snižavanje tlaka do prvog tlaka razdvajanja p2, koji je niži od tlaka ekstrahiranja p1, kako bi se istaložilo prvi produkt (23), koji sadrži ulje rižinih mekinja, iz suprakritičnog CO2; i
c) drugom koraku razdvajanja, koji uključuje prebacivanje suprakritičnog CO2 i preostalog ekstrakta (29) iz koraka b) u drugu posudu za razdvajanje (33) i snižavanje tlaka do drugog tlaka razdvajanja p3, koji je niži od prvog tlaka razdvajanja p2, kako bi se istaložilo drugi produkt (35), koji sadrži vosak rižinih mekinja iz plinovitog CO2,
naznačen time što je temperatura ekstrahiranja T1 za korak ekstrahiranja a) u rasponu od 55 °C do 65 °C,
prva je temperatura razdvajanja T2 u rasponu od 70 °C do 80 °C, a
druga temperatura razdvajanja T3 je u rasponu od 45 °C do 55 °C.1. Procedure for the separation extraction of rice bran oil and rice bran waxes in the following steps:
a) the extraction step, which includes providing an extraction vessel (13) containing rice bran (15) and percolating supercritical CO2 (12) through the extraction vessel (13) at an extraction pressure p1 in the range of 100 to 1000 bar (10 to 100 MPa ) and at the extraction temperature T1;
b) the first separation step, which includes transferring the supercritical CO2 and the extract (17), which contains the oils and waxes from step a), to the separation vessel (21) and reducing the pressure to the first separation pressure p2, which is lower than the extraction pressure p1 , in order to precipitate the first product (23), which contains rice bran oil, from supercritical CO2; and
c) to the second separation step, which includes transferring the supercritical CO2 and the remaining extract (29) from step b) to the second separation vessel (33) and reducing the pressure to the second separation pressure p3, which is lower than the first separation pressure p2, in order to precipitated another product (35), which contains rice bran wax from gaseous CO2,
characterized by the fact that the extraction temperature T1 for the extraction step a) is in the range from 55 °C to 65 °C,
the first separation temperature T2 is in the range from 70 °C to 80 °C, and
the second separation temperature T3 is in the range of 45 °C to 55 °C.
2. Postupak u skladu s patentnim zahtjevom 1, naznačen time što je tlak ekstrahiranja p1 za korak ekstrahiranja a) u rasponu od 100 do 400 bar (10 do 40 MPa), po mogućnosti u rasponu od 200 do 350 bar (20 do 35 MPa), po mogućnosti 250 do 320 bar (25 do 32 MPa), a najpoželjnije oko 280 bar (28 MPa).2. The process according to claim 1, characterized in that the extraction pressure p1 for the extraction step a) is in the range of 100 to 400 bar (10 to 40 MPa), preferably in the range of 200 to 350 bar (20 to 35 MPa ), preferably 250 to 320 bar (25 to 32 MPa), and most preferably around 280 bar (28 MPa).
3. Postupak u skladu s patentnim zahtjevom 1 ili 2, naznačen time što je temperatura ekstrahiranja T1 za korak ekstrahiranja a) oko 60 °C.3. The process according to claim 1 or 2, characterized in that the extraction temperature T1 for the extraction step a) is about 60 °C.
4. Postupak u skladu s patentnim zahtjevom 1, naznačen time što je prva temperatura razdvajanja T2 oko 75 °C.4. The method according to claim 1, characterized in that the first separation temperature T2 is about 75 °C.
5. Postupak u skladu s bilo kojim od patentnih zahtjeva 1 do 4, naznačen time što je drugi tlak razdvajanja p3 za drugi korak razdvajanja c) podešen ispod 73,8 bar (7,38 MPa), po mogućnosti ispod 65 bar (6,5 MPa), a najpoželjnije na oko 60 bar (6 MPa).5. The method according to any one of claims 1 to 4, characterized in that the second separation pressure p3 for the second separation step c) is set below 73.8 bar (7.38 MPa), preferably below 65 bar (6, 5 MPa), and most preferably at around 60 bar (6 MPa).
6. Postupak u skladu s patentnim zahtjevom 1, naznačen time što je druga temperatura razdvajanja T3 oko 50 °C.6. The method according to claim 1, characterized in that the second separation temperature T3 is about 50 °C.
7. Postupak u skladu s bilo kojim od patentnih zahtjeva 1 do 6, naznačen time što se korak ekstrahiranja a) provodi pri omjeru otapalo/punjenje u rasponu od 25 do 45, po mogućnosti 30 do 40, a najpoželjnije oko 36.7. Process according to any one of patent claims 1 to 6, characterized in that the extraction step a) is carried out at a solvent/charge ratio in the range of 25 to 45, preferably 30 to 40, and most preferably around 36.
8. Postupak u skladu s bilo kojim od patentnih zahtjeva 1 do 7, naznačen time što dodatno uključuje korak prikupljanja d), u kojem se temperaturu plinovitog CO2 nakon drugog koraka razdvajanja c) snizi do temperature prikupljanja T4, na kojoj plinoviti CO2 prelazi u tekuće stanje.8. The method according to any one of patent claims 1 to 7, characterized in that it additionally includes a collection step d), in which the temperature of gaseous CO2 after the second separation step c) is lowered to the collection temperature T4, at which gaseous CO2 changes to liquid state.
9. Postupak u skladu s patentnim zahtjevom 8, naznačen time što temperatura prikupljanja T4 je najviše 30 °C, po mogućnosti u rasponu od 0 °C do 30 °C, a najpoželjnije oko 5 °C do 15 °C.9. The method according to patent claim 8, characterized in that the temperature of collection T4 is at most 30 °C, preferably in the range from 0 °C to 30 °C, and most preferably around 5 °C to 15 °C.
10. Postupak u skladu s bilo kojim od patentnih zahtjeva 8 ili 9, naznačen time što se, nakon koraka prikupljanja d), tlak i temperaturu tekućeg CO2 povisi do tlaka ekstrahiranja p1 i temperature ekstrahiranja T1 kako bi se promijenilo stanje CO2 do suprakritičnog kako bi ga se moglo ponovno upotrijebiti u koraku ekstrahiranja a).10. A process according to either of claims 8 or 9, characterized in that, after the collection step d), the pressure and temperature of the liquid CO2 is increased to the extraction pressure p1 and the extraction temperature T1 in order to change the state of the CO2 to supercritical in order to it could be reused in the extraction step a).